Add new passes to X86 pipeline tests

[mtrofin]

Summary

Fixes test failures introduced by rL347596.

[davidxl]

lgtm

llvm/trunk/lib/Target/X86/X86DiscriminateMemOps.cpp

 /// Discriminator> pair.
 void updateDebugInfo(MachineInstr *MI, const DILocation *Loc) {
   DebugLoc DL(Loc);
   MI->setDebugLoc(DL);
 }
 
 class X86DiscriminateMemOps : public MachineFunctionPass {
   bool runOnMachineFunction(MachineFunction &MF) override;
+  StringRef getPassName() const override {
+    return "X86 Discriminate Memory Operands";
+  }
 
 public:
   static char ID;
 
   /// Default construct and initialize the pass.
   X86DiscriminateMemOps();
 };
 

llvm/trunk/lib/Target/X86/X86InsertPrefetch.cpp

class X86InsertPrefetch : public MachineFunctionPass {
   };
   typedef SmallVectorImpl<PrefetchInfo> Prefetches;
   bool findPrefetchInfo(const FunctionSamples *Samples, const MachineInstr &MI,
                         Prefetches &prefetches) const;
 
 public:
   static char ID;
   X86InsertPrefetch(const std::string &PrefetchHintsFilename);
+  StringRef getPassName() const override {
+    return "X86 Insert Cache Prefetches";
+  }
 
 private:
   std::string Filename;
   std::unique_ptr<SampleProfileReader> Reader;
 };
 
 using PrefetchHints = SampleRecord::CallTargetMap;
 

llvm/trunk/test/CodeGen/X86/O0-pipeline.ll

 ; CHECK-NEXT:       Machine Optimization Remark Emitter
 ; CHECK-NEXT:       Prologue/Epilogue Insertion & Frame Finalization
 ; CHECK-NEXT:       Post-RA pseudo instruction expansion pass
 ; CHECK-NEXT:       X86 pseudo instruction expansion pass
 ; CHECK-NEXT:       Analyze Machine Code For Garbage Collection
 ; CHECK-NEXT:       Shadow Call Stack
 ; CHECK-NEXT:       X86 Indirect Branch Tracking
 ; CHECK-NEXT:       X86 vzeroupper inserter
+; CHECK-NEXT:       X86 Discriminate Memory Operands
+; CHECK-NEXT:       X86 Insert Cache Prefetches
 ; CHECK-NEXT:       Contiguously Lay Out Funclets
 ; CHECK-NEXT:       StackMap Liveness Analysis
 ; CHECK-NEXT:       Live DEBUG_VALUE analysis
 ; CHECK-NEXT:       Insert fentry calls
 ; CHECK-NEXT:       Insert XRay ops
 ; CHECK-NEXT:       Implement the 'patchable-function' attribute
 ; CHECK-NEXT:       X86 Retpoline Thunks
 ; CHECK-NEXT:       Check CFA info and insert CFI instructions if needed
 ; CHECK-NEXT:       Lazy Machine Block Frequency Analysis
 ; CHECK-NEXT:       Machine Optimization Remark Emitter
 ; CHECK-NEXT:       X86 Assembly Printer
 ; CHECK-NEXT:       Free MachineFunction
 
 define void @f() {
   ret void
 }

llvm/trunk/test/CodeGen/X86/O3-pipeline.ll

 ; CHECK-NEXT:       X86 Indirect Branch Tracking
 ; CHECK-NEXT:       X86 vzeroupper inserter
 ; CHECK-NEXT:       MachineDominator Tree Construction
 ; CHECK-NEXT:       Machine Natural Loop Construction
 ; CHECK-NEXT:       X86 Byte/Word Instruction Fixup
 ; CHECK-NEXT:       X86 Atom pad short functions
 ; CHECK-NEXT:       X86 LEA Fixup
 ; CHECK-NEXT:       Compressing EVEX instrs to VEX encoding when possible
+; CHECK-NEXT:       X86 Discriminate Memory Operands
+; CHECK-NEXT:       X86 Insert Cache Prefetches
 ; CHECK-NEXT:       Contiguously Lay Out Funclets
 ; CHECK-NEXT:       StackMap Liveness Analysis
 ; CHECK-NEXT:       Live DEBUG_VALUE analysis
 ; CHECK-NEXT:       Insert fentry calls
 ; CHECK-NEXT:       Insert XRay ops
 ; CHECK-NEXT:       Implement the 'patchable-function' attribute
 ; CHECK-NEXT:       X86 Retpoline Thunks
 ; CHECK-NEXT:       Check CFA info and insert CFI instructions if needed
 ; CHECK-NEXT:       Lazy Machine Block Frequency Analysis
 ; CHECK-NEXT:       Machine Optimization Remark Emitter
 ; CHECK-NEXT:       X86 Assembly Printer
 ; CHECK-NEXT:       Free MachineFunction
 
 define void @f() {
   ret void
 }